Thermochemistry with Equation Stoichiometry

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Questions

• Can someone explain how to do this? Consider the following equation: 2ZnS(s) + 3O2(g) ---> 2ZnO(s) + 2SO2(g), ΔH° = –878.2 kJ. What is the enthalpy change when 223.9 g ZnS(s) reacts in excess oxygen?
• Can someone explain how to do this? Consider the following equation: 2ZnS(s) + 3O2(g) ---> 2ZnO(s) + 2SO2(g), ΔH° = –878.2 kJ. How much heat is released when 2.3 x 10ˉ² mol ZnS(s) reacts in excess oxygen?
• Is enthalpy always negative?
• Can someone explain how to do this? Consider the following equation: 2ZnS(s) + 3O2(g) ---> 2ZnO(s) + 2SO2(g), ΔH° = –878.2 kJ. How much heat is released when 3.0 mol ZnS(s) reacts in excess oxygen?
• Can someone explain how to do this? Consider the following equation: #"2ZnS"# + #"3O"_2# #rarr# #"2ZnO"# + #"2SO"_2# , ΔH° = - 878.2kJ. What is the enthalpy change when 0.96 g ZnO is produced?
• Can someone explain to me how to do this? Consider the following equation: 2ZnS + 3O₂ ---> 2ZnO + 2SO₂ , ΔH° = - 878.2kJ. How much heat is released when 3.0 mol ZnS reacts in excess oxygen?
• How can the standard enthalpy of formation of CO be calculated?
• How can I explain the enthalpy of a system?
• How do I interpret an enthalpy diagram?
• What is thermochemistry with equation stoichiometry?
• What are some examples of chemical reactions?
• What mass of propane will produce 4.8 MJ of energy when undergoing complete combustion ?
• Question #9245f
• Question #4d4ad
• Question #bf193
• Question #1ffa9
• Question #c99b3
• Why are chlorine anions larger than chlorine atoms?
• How much heat will be released when 6.44 g of sulfur reacts with excess O2 according to the following reaction?
• Question #ba858
• The decomposition of #H_2O_2# produces water and oxygen gas, releasing 197 kJ per one mole of #H_2O_2#. How much energy is released if we start with 798 grams of #H_2O_2#?
• In photosynthesis glucose c6h12o6 and o2 are produced from co2 and h2o. 6CO2(g)+6H2O(l)+680kcal=C6H12O6(aq)+6O2(g) How much heat in kilojoules is needed to produce 19.5g of c6h12o6?
• 74. The equation for the combustion of #CH_4# (the main component of natural gas) is shown below. How much heat is produced by the complete combustion of 237 g of #CH_4#?
• When a 21.1-g sample of ethyl alcohol (molar mass 46.07 g/mol) is burned, how much energy is released as heat?
• What is the calories needed to heat 11.4 g of water from 21.0°C to 43.0°C?
• What is a chemical reaction that absorbs heat from the surrounding? Does this reaction have a neutral, positive or negative #DeltaH# at constant pressure?
• A 10.0 g sample of water at 50°C and 10.0 g sample of iron at 10°C are placed in a beaker together. What will happen to the temperature of the water?
• Question #6f117
• One liter of water at 10° Celsius is added to one liter at 80° Celsius. What is the final temperature of the mixture?
• An ideal gas undergoes a change of state (2.0 atm. 3.0 L, 95 K ) to (4.0 atm. 5.0 L, 245 K) with a change in internal energy, #DeltaU# = 30.0 L atm. The change in enthalpy (#DeltaH#) of the process in L atm is (A) 44 (B) 42.3 (C) ?